Personally, I would go with FS2. Especially since you can download the FS1 campaign converted to the Opensource FS2 engine, which looks a lot better than the original.
Another thing: if you're not sure about the engine, give this a go:
Wing Commander Saga You can download the episode for free, and you can see what the FS2 engine can do.
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-Home Fries
XBL: The Mad Gonzo
The average Naval Aviator, despite the sometimes swaggering exterior, is very much capable of such feelings as love, affection, intimacy, and caring.
These feelings just don't involve anyone else.